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Stock Specification
MATERIAL | N-BK7 |
DIAMETER TOLERANCE | + 0.0 / - 0.1mm | |
THICKNESS TOLERANCE | ± 0.2mm | SURFACE QUALITY | 60/40 | |
CENTRATION | ≤ 3 arc MINS | FOCAL LENGTH | ± 2% | |
IRREGULARITY | λ/4 @ 632.8nm | COATING | CONTACT US |